Improvement in manufacture of steel



, carbonate of potash, one and one-half pound UNITED STATES PATENT Enron.-

FIDEL BEROHTOLD, OF CLEVELAND, OHIO.

IMPROVEMENT IN MANUFACTURE OF STEEL.

Specification forming partof Letters Patent No. 9210,7415, dated December 10,1878; application filed April 9,

To all whom it may concern:

Be it known that I, FIDEL BnncHToLn, of Cleveland, in the county of (luyahoge and State of Ohio, have invented certain new and useful Improvements in Compounds for Use in the Manufacture of Cast-Steel; and I do hereby declare the following to benfull, clear, and exact description of the invention, such as will enable others skilledin the art to which it pertains to make and use it.

My invention relates to that class of compounds or mixtures which are used in the manufacture of cast-steel, and which employ the nitrogen compounds and the alkaline salts.

It consists in acompound or mass of the following description: three pounds of Prussian blue, one and one-half pound of a mixture consisting oi equal-weight parts of iron filings and sand, mixed together and kept dump until rusted or oxidized, one pound of of cyanide of potassium, two and one-half pounds of bornte of soda, one-half pound of carbonate of soda one-half pound of silicate of potash or soda, and two pounds of carbon, which may be charcoal from any hard wood. The given proportions of these several ingredients may be slightly varied from the formula given; but substantially the some parts and proportions should always be maintained.

In preparing iron for the manufacture of steel, three-fourths of an ounce, more or less,

of the compound should be mixed with every twenty-five pounds of the iron. This quantity of mixture will be varied by the quality of the iron used, since if the iron is hard it less quantity of the compound will answer, while if it is soft a greater quantity will be required.

By melting the iron together with such a quantity of the compound, steel of high quality will be produced, the same being adapted for any of the uses to which steel is put.

The compound should he used the same day thutit is prepared; but it kept over to any subsequent time it should be plecedin a close vessel.

Hztvin g fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

A composition to be introduced into molten iron to assist in converting the same into steel, consisting of Prussian blue, the described oxidized mixture of iron filings and sand, carbonnte of potash, cyanide of potassium, borate of soda, carbonate of soda, silicate of potash or soda, and carbon, in the proportions described, substantially as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

FIDEL BERGHTOLD.

Witnesses Jno. ORoWnLL, J12, F. ToUMnY. 

